Resumo

CHACON, C.; DELGADO-NINO, P.  e  DELGADO, G. E.. Synthesis and crystal structure determination of the new olivine-type compound Mn₂SnSe₄. Rev. mex. fis. [online]. 2020, vol.66, n.1, pp.30-34.  Epub 27-Nov-2020. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.66.30.

The Mn2Sn Se4 compound, manganese tin selenide, was synthesized by the melt and annealing technique and its structure was refined by the Rietveld method using X-ray powder diffraction data. This compound crystallizes in the olivine-type structure with unit cell parameters a = 12:9028(2) Å, b = 7:9001(1) Å, c = 6:5015(1) Å, V = 662:72(2) °A3 in the orthorhombic space group Pnma (N± 62). This olivine structure can be described from a hexagonal close-packing of selenium atoms where manganese atoms occupy 1/2 of the octahedral sites while thin atoms lay in 1/8 of the tetrahedra.

Palavras-chave : Olivines; chacogenides; semiconductors; chemical synthesis; crystal structure; X-ray powder diffraction; Rietveld refinement; 61.05.cp; 61.50.Nw: 61.66.Fn; 61.40.b.

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